Photo taken on Oct. 13, 2020 shows the dredging vessel Tian Kun Hao at a port in Shenzhen, south China's Guangdong Province. The manned submersible Jiaolong, its mothership Shenhai Yihao (DeepSea No. 1), and dredging vessel Tian Kun Hao will be displayed during the China Marine Economy Expo (CMEE). (Xinhua/Mao Siqian)

(Xinhua/Mao Siqian)

A journalist works next to the manned submersible Jiaolong on its mothership Shenhai Yihao (DeepSea No. 1) at a port in Shenzhen, south China's Guangdong Province, Oct. 13, 2020. (Xinhua/Mao Siqian)

Crew members are seen on the dredging vessel Tian Kun Hao at a port in Shenzhen, south China's Guangdong Province, Oct. 13, 2020. (Xinhua/Mao Siqian)

Journalists take photos of the manned submersible Jiaolong on its mothership Shenhai Yihao (DeepSea No. 1) at a port in Shenzhen, south China's Guangdong Province, Oct. 13, 2020. (Xinhua/Mao Siqian)

Photo taken on Oct. 13, 2020 shows the Shenhai Yihao (DeepSea No. 1) at a port in Shenzhen, south China's Guangdong Province. (Xinhua/Mao Siqian)